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Date: Wed, 18 May 2022 22:48:49 +0900
From: Masami Hiramatsu (Google) <mhiramat@...nel.org>
To: kernel test robot <lkp@...el.com>
Cc: Jeff Xie <xiehuan09@...il.com>, rostedt@...dmis.org,
llvm@...ts.linux.dev, kbuild-all@...ts.01.org, mingo@...hat.com,
mhiramat@...nel.org, zanussi@...nel.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v10 1/4] trace: Add trace any kernel object
Hi Jeff,
Can you fix these errors, since these looks real bugs.
Thank you,
On Fri, 13 May 2022 10:01:48 +0800
kernel test robot <lkp@...el.com> wrote:
> Hi Jeff,
>
> Thank you for the patch! Perhaps something to improve:
>
> [auto build test WARNING on rostedt-trace/for-next]
> [also build test WARNING on v5.18-rc6 next-20220512]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch]
>
> url: https://github.com/intel-lab-lkp/linux/commits/Jeff-Xie/trace-Introduce-objtrace-trigger-to-trace-the-kernel-object/20220513-010820
> base: https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git for-next
> config: i386-randconfig-c001 (https://download.01.org/0day-ci/archive/20220513/202205130923.SJJN7oez-lkp@intel.com/config)
> compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 9519dacab7b8afd537811fc2abaceb4d14f4e16a)
> reproduce (this is a W=1 build):
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # https://github.com/intel-lab-lkp/linux/commit/3c91aa291a0fe8b28b02a14827b0c4ca3ebda601
> git remote add linux-review https://github.com/intel-lab-lkp/linux
> git fetch --no-tags linux-review Jeff-Xie/trace-Introduce-objtrace-trigger-to-trace-the-kernel-object/20220513-010820
> git checkout 3c91aa291a0fe8b28b02a14827b0c4ca3ebda601
> # save the config file
> mkdir build_dir && cp config build_dir/.config
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash kernel/trace/
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
>
> All warnings (new ones prefixed by >>):
>
> kernel/trace/trace_object.c:259:13: error: incompatible function pointer types initializing 'int (*)(struct seq_file *, struct event_trigger_ops *, struct event_trigger_data *)' with an expression of type 'int (struct seq_file *, struct event_trigger_data *)' [-Werror,-Wincompatible-function-pointer-types]
> .print = trace_object_trigger_print,
> ^~~~~~~~~~~~~~~~~~~~~~~~~~
> kernel/trace/trace_object.c:260:12: error: incompatible function pointer types initializing 'int (*)(struct event_trigger_ops *, struct event_trigger_data *)' with an expression of type 'int (struct event_trigger_data *)' [-Werror,-Wincompatible-function-pointer-types]
> .init = event_object_trigger_init,
> ^~~~~~~~~~~~~~~~~~~~~~~~~
> kernel/trace/trace_object.c:261:12: error: incompatible function pointer types initializing 'void (*)(struct event_trigger_ops *, struct event_trigger_data *)' with an expression of type 'void (struct event_trigger_data *)' [-Werror,-Wincompatible-function-pointer-types]
> .free = trace_object_trigger_free,
> ^~~~~~~~~~~~~~~~~~~~~~~~~
> kernel/trace/trace_object.c:266:13: error: incompatible function pointer types initializing 'int (*)(struct seq_file *, struct event_trigger_ops *, struct event_trigger_data *)' with an expression of type 'int (struct seq_file *, struct event_trigger_data *)' [-Werror,-Wincompatible-function-pointer-types]
> .print = trace_object_trigger_print,
> ^~~~~~~~~~~~~~~~~~~~~~~~~~
> kernel/trace/trace_object.c:267:12: error: incompatible function pointer types initializing 'int (*)(struct event_trigger_ops *, struct event_trigger_data *)' with an expression of type 'int (struct event_trigger_data *)' [-Werror,-Wincompatible-function-pointer-types]
> .init = event_object_trigger_init,
> ^~~~~~~~~~~~~~~~~~~~~~~~~
> kernel/trace/trace_object.c:268:12: error: incompatible function pointer types initializing 'void (*)(struct event_trigger_ops *, struct event_trigger_data *)' with an expression of type 'void (struct event_trigger_data *)' [-Werror,-Wincompatible-function-pointer-types]
> .free = trace_object_trigger_free,
> ^~~~~~~~~~~~~~~~~~~~~~~~~
> >> kernel/trace/trace_object.c:335:61: warning: format specifies type 'long' but the argument has type 'unsigned int' [-Wformat]
> pr_err("the size of the %s should be:%ld\n", field->name, sizeof(void *));
> ~~~ ^~~~~~~~~~~~~~
> %u
> include/linux/printk.h:489:33: note: expanded from macro 'pr_err'
> printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
> ~~~ ^~~~~~~~~~~
> include/linux/printk.h:446:60: note: expanded from macro 'printk'
> #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
> ~~~ ^~~~~~~~~~~
> include/linux/printk.h:418:19: note: expanded from macro 'printk_index_wrap'
> _p_func(_fmt, ##__VA_ARGS__); \
> ~~~~ ^~~~~~~~~~~
> kernel/trace/trace_object.c:356:3: error: implicit declaration of function 'event_trigger_unregister' [-Werror,-Wimplicit-function-declaration]
> event_trigger_unregister(cmd_ops, file, glob+1, trigger_data);
> ^
> kernel/trace/trace_object.c:356:3: note: did you mean 'event_trigger_register'?
> kernel/trace/trace.h:1650:12: note: 'event_trigger_register' declared here
> extern int event_trigger_register(struct event_command *cmd_ops,
> ^
> kernel/trace/trace_object.c:370:64: error: too few arguments to function call, expected 7, have 4
> ret = event_trigger_register(cmd_ops, file, glob, trigger_data);
> ~~~~~~~~~~~~~~~~~~~~~~ ^
> kernel/trace/trace.h:1650:12: note: 'event_trigger_register' declared here
> extern int event_trigger_register(struct event_command *cmd_ops,
> ^
> 1 warning and 8 errors generated.
>
>
> vim +335 kernel/trace/trace_object.c
>
> 296
> 297 static int
> 298 event_object_trigger_parse(struct event_command *cmd_ops,
> 299 struct trace_event_file *file,
> 300 char *glob, char *cmd, char *param_and_filter)
> 301 {
> 302 struct event_trigger_data *trigger_data;
> 303 struct objtrace_trigger_data *obj_data;
> 304 struct ftrace_event_field *field;
> 305 char *objtrace_cmd, *arg;
> 306 char *param, *filter;
> 307 int ret;
> 308 bool remove;
> 309
> 310 remove = event_trigger_check_remove(glob);
> 311
> 312 /*
> 313 * separate the param and the filter:
> 314 * objtrace:add:OBJ[:COUNT] [if filter]
> 315 */
> 316 ret = event_trigger_separate_filter(param_and_filter, ¶m, &filter, true);
> 317 if (ret)
> 318 return ret;
> 319
> 320 objtrace_cmd = strsep(¶m, ":");
> 321 if (!objtrace_cmd || strcmp(objtrace_cmd, "add")) {
> 322 pr_err("error objtrace command\n");
> 323 return -EINVAL;
> 324 }
> 325
> 326 arg = strsep(¶m, ":");
> 327 if (!arg)
> 328 return -EINVAL;
> 329
> 330 field = trace_find_event_field(file->event_call, arg);
> 331 if (!field)
> 332 return -EINVAL;
> 333
> 334 if (field->size != sizeof(void *)) {
> > 335 pr_err("the size of the %s should be:%ld\n", field->name, sizeof(void *));
> 336 return -EINVAL;
> 337 }
> 338
> 339 if (remove && !field_exist(file, cmd_ops, field->name))
> 340 return -EINVAL;
> 341
> 342 obj_data = kzalloc(sizeof(*obj_data), GFP_KERNEL);
> 343 if (!obj_data)
> 344 return -ENOMEM;
> 345
> 346 obj_data->field = field;
> 347 obj_data->tr = file->tr;
> 348 snprintf(obj_data->objtrace_cmd, OBJTRACE_CMD_LEN, objtrace_cmd);
> 349
> 350 trigger_data = event_trigger_alloc(cmd_ops, cmd, param, obj_data);
> 351 if (!trigger_data) {
> 352 kfree(obj_data);
> 353 return -ENOMEM;
> 354 }
> 355 if (remove) {
> 356 event_trigger_unregister(cmd_ops, file, glob+1, trigger_data);
> 357 kfree(obj_data);
> 358 kfree(trigger_data);
> 359 return 0;
> 360 }
> 361
> 362 ret = event_trigger_parse_num(param, trigger_data);
> 363 if (ret)
> 364 goto out_free;
> 365
> 366 ret = event_trigger_set_filter(cmd_ops, file, filter, trigger_data);
> 367 if (ret < 0)
> 368 goto out_free;
> 369
> 370 ret = event_trigger_register(cmd_ops, file, glob, trigger_data);
> 371 if (ret)
> 372 goto out_free;
> 373
> 374 return ret;
> 375
> 376 out_free:
> 377 event_trigger_reset_filter(cmd_ops, trigger_data);
> 378 kfree(obj_data);
> 379 kfree(trigger_data);
> 380 return ret;
> 381 }
> 382
>
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp
--
Masami Hiramatsu <mhiramat@...nel.org>
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